Improved stitch for soles and vamps



UNITED SATES Feroe,

AraNt IMPROVED STITCH FOR/SOLES AND VAIVIPS.

Speciiication forming part of Letters Patent No. 44,275, dated September20, 1864.

To all 'whom it may conce/rn Be it known that I, LYMAN R. BLAKE, ofQuincy, in the county ot' Norfolk and State of Massachusetts, haveinvented an Improved Stitch for Uniting Soles and Vamps, duc.; and I dohereby declare that the following, taken in connection with the drawingwhich accompanies andforms part or this specification, is a descriptionot' my invention suticient to enable those skilled in the art topractice it.

This improvement relates principally to the manufacture of boots andshoes, having reference to the manner of connecting or uniting the vampsand soles. It is, however, applicable to other manufactures ot' leatherwhere two parts are generally united by sewing, nailing, or pegging themtogether.

The invention consists -in the employment of a novel stitch for unitingthe pieces of leather or similar material, such Stitches heilig i'ormedfrom a continuous thread suitably prepared with wax or other adhesivesubstance to impart the proper degree of tenacity or adi hesion in andto the parts united.

The drawing shows a sectional view of two pieces olileatherjoined by myimproved stitch, such section showing the disposition ot' the thread.

To apply the stitch by hand, the pieces to y be sewed are suitablyfastened by clamps, nails,

or otherwise, and awl-holes made at such distances apart as it isdesirable to have the stitches. The thread being then laid over theholes, it may be driven successively into the series of holes from thesurface a al, or a hook or crochet-needle may be passed through theleather from the surface b b, hooking into and drawing the threadsuccessively through the series of holes.

In practicing theinvention by machine the common wax-thread chain-stitchmachine employing a crochet-needle may be used, a suitable device beingapplied to slip the stitch out of the hook when it rises from the work,so that when the work is fed and the needle descends it shall not gothrough the previouslyformed loop, but shall descend in rear of thesame. Tith an eyepointed-needle machine sewing with a chain-stitch it isonly necessary to detain the loop below the work when the needle rises,Without so laying Such loop that the needle in its next descent shallpass through it. Vith the rotating-horn sewing-machine shoes can besewed by this invention with the same facility as with the commonstitch. In all ot' these methods of applying' the stitch the closingofthe work upon the thread and the. adhesiveness of the wax` cause thethreads ot' each stitch to bind in th'e awl or needle hole. The upperportion of the stitch may be laid in a channel, and the .thread may beleft up some distance beyond the Surface of the groove or channel forthis purpose, as seen atc, this thread being subsequently pressed downinto the channel and covered by the Hap.

In performing Sewing by automatic mechanism producing this novel Stitchor looping it will be found convenient and expedient to draw the loopsin the tirst place some distance above the surface ot' the leather inorder conveniently to detach them from the hook it' a crochet-needle beemployed. This protruding portion of each loop is drawn back to ornearly to said surface when the next loop is made, and to regulate thiswithdrawal so as to prevent the loops from beingwithdrawn into the stockor entirely out of it, an automatic deviceis attached tothesewiiig-machine, which enters the loop, and upon which the tensionot' the thread is received, and upon withdrawal of this device the smallloop seen at c is leftprojecting. rlhe thread atc is flattened andenlarged by being tightened upon the said detaining device, and when itis pressedeor hainmered down into the channel formed for its receptionthe loops have a head which increase their holding force. Where thebight of each loop is to be drawn flush with or slightly below theSurface, the device employed to prevent too great withdrawal of the loopacts to bind or clamp the thread temporarily, and the feeding device orpoint Shown in the McKay & Mathies rotating-horn sewing-machine may beso timed and operated as to add this dctaining operation to itsfunction.

I claim- The employment of the new Stitch for uniting soles and Vamps ofboots and Shoes, and for a similar use-in other manufactures, in theAmanner substantially as described.

LYMAN R. BLAKE.

Witnesses:

J. B. CROSBY, F. GoULn.

